Pekkola Oili, Lungenschmied Christoph, Fejes Peter, Handreck Anke, Hermes Wilfried, Irle Stephan, Lennartz Christian, Schildknecht Christian, Schillen Peter, Schindler Patrick, Send Robert, Valouch Sebastian, Thiel Erwin, Bruder Ingmar
TrinamiX GmbH - a subsidiary of BASF SE, Industriestr. 35, 67063, Ludwigshafen, Germany.
ERT Optik Dr. Thiel GmbH, Donnersbergweg 1, 67059, Ludwigshafen, Germany.
Sci Rep. 2018 Jun 15;8(1):9208. doi: 10.1038/s41598-018-27475-1.
We present the Focus-Induced Photoresponse (FIP) technique, a novel approach to optical distance measurement. It takes advantage of a universally-observed phenomenon in photodetector devices, an irradiance-dependent responsivity. This means that the output from a sensor is not only dependent on the total flux of incident photons, but also on the size of the area in which they fall. If probe light from an object is cast on the detector through a lens, the sensor response depends on how far in or out of focus the object is. We call this the FIP effect. Here we demonstrate how to use the FIP effect to measure the distance to that object. We show that the FIP technique works with different sensor types and materials, as well as visible and near infrared light. The FIP technique operates on a working principle, which is fundamentally different from all established distance measurement methods and hence offers a way to overcome some of their limitations. FIP enables fast optical distance measurements with a simple single-pixel detector layout and minimal computational power. It allows for measurements that are robust to ambient light even outside the wavelength range accessible with silicon.
我们介绍了聚焦诱导光响应（FIP）技术，这是一种用于光学距离测量的新方法。它利用了光电探测器器件中普遍存在的一种现象，即与辐照度相关的响应度。这意味着传感器的输出不仅取决于入射光子的总通量，还取决于光子照射区域的大小。如果来自物体的探测光通过透镜投射到探测器上，传感器的响应取决于物体的聚焦程度。我们将此称为FIP效应。在此，我们展示了如何利用FIP效应来测量到该物体的距离。我们表明，FIP技术适用于不同类型和材料的传感器，以及可见光和近红外光。FIP技术的工作原理与所有已有的距离测量方法根本不同，因此提供了一种克服它们某些局限性的方法。FIP能够通过简单的单像素探测器布局和最小的计算能力实现快速光学距离测量。它允许在即使超出硅可探测波长范围的环境光条件下进行稳健的测量。
